Vacuum cleaner



FIG. 1 is a front elevational view of a vacuum cleaner showing our new design;

FIG. 2 is a rear elevational view thereof;

FIG. 3 is a right side elevational view thereof;

FIG. 4 is a left side elevational view thereof;

FIG. 5 is a top plan view thereof; and,

FIG. 6 is a bottom plan view thereof.

The details shown in broken lines in FIGS. 1, 3 and 4 are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for a vacuum cleaner, as shown and described. 